1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
Classes to simplify the handling and caching of temporary files.
Copyright (c) 2008 by Alastair M. Robinson
TempFileTracker is a header class which maintains a list of TempFiles
and deletes them when it's destroyed, typically when the application
quits.
TempFile is a base class which will be subclassed by classes needing
to generate a specific type of temporary file.
*/
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include "tempfile.h"
#include "debug.h"
using namespace std;
TempFile::TempFile(TempFileTracker *header,const char *pfix,const char *skey)
: filename(NULL), prefix(NULL), searchkey(NULL), header(header), nexttempfile(NULL), prevtempfile(NULL)
{
header->mutex.ObtainMutex();
if((prevtempfile=header->firsttempfile))
{
while(prevtempfile->nexttempfile)
prevtempfile=prevtempfile->nexttempfile;
prevtempfile->nexttempfile=this;
}
else
header->firsttempfile=this;
// if((nexttempfile=header->firsttempfile))
// nexttempfile->prevtempfile=this;
// header->firsttempfile=this;
if(skey)
searchkey=strdup(skey);
if(pfix)
prefix=strdup(pfix);
header->mutex.ReleaseMutex();
}
TempFile::~TempFile()
{
// Debug[TRACE] << "In TempFile destructor" << endl;
header->mutex.ObtainMutex();
if(filename)
{
// Debug[TRACE] << "Removing " << filename << endl;
remove(filename);
free(filename);
}
if(searchkey)
free(searchkey);
if(prefix)
free(prefix);
if(nexttempfile)
nexttempfile->prevtempfile=prevtempfile;
if(prevtempfile)
prevtempfile->nexttempfile=nexttempfile;
else
header->firsttempfile=nexttempfile;
header->mutex.ReleaseMutex();
}
const char *TempFile::Filename()
{
// If no subclass has provided a filename, generate one here.
if(!filename)
filename=tempnam(NULL,prefix);
return(filename);
}
TempFile *TempFile::NextTempFile()
{
return(nexttempfile);
}
bool TempFile::MatchTempFile(const char *skey)
{
return(strcmp(skey,searchkey)==0);
}
// TempFileTracker
TempFileTracker::TempFileTracker() : mutex(), firsttempfile(NULL)
{
}
TempFileTracker::~TempFileTracker()
{
mutex.ObtainMutex();
while(firsttempfile)
delete firsttempfile;
mutex.ReleaseMutex();
}
TempFile *TempFileTracker::GetTempFile(const char *prefix,const char *searchkey)
{
mutex.ObtainMutexShared();
TempFile *result=NULL;
if(searchkey)
result=FindTempFile(searchkey);
if(!result)
result=new TempFile(this,prefix,searchkey);
mutex.ReleaseMutexShared();
return(result);
}
TempFile *TempFileTracker::FindTempFile(const char *searchkey)
{
mutex.ObtainMutexShared();
TempFile *result=NULL;
TempFile *t=FirstTempFile();
while(t)
{
t=t->NextTempFile();
if(t->MatchTempFile(searchkey))
{
result=t;
t=NULL;
}
}
mutex.ReleaseMutexShared();
return(result);
}
TempFile *TempFileTracker::FirstTempFile()
{
mutex.ObtainMutexShared();
TempFile *result=firsttempfile;
mutex.ReleaseMutexShared();
return(result);
}
|
